Nieman became an everyday St. Louis outfielder and later played regularly for the Tigers and Orioles. In his 1113-game career he batted .295, with 125 home runs, 544 RBI, 455 runs, 1018 hits, 180 doubles, 32 triples and 10 stolen bases. After retiring he served as a scout for the Indians, Dodgers, Athletics, White Sox and Yankees.